Best Materials for Acid-Resistant O-Rings | O-Rings - Rubber
2016/11/09· Fluorocarbon Rubber. Fluorocarbon Rubber, or FKM, is best for appliions requiring both chemical and heat resistance up to 400 degrees Fahrenheit, in addition to the acid resistant quality. There are even FDA grades available for food and beverage appliions. A lot of food products are acidic, such as sodas, juices, and other fruit products.